Thursday, 22 October 2020

Yamaha XT125X XT125R 125 blog valve clearance adjustment tappets

 


Just done a tappets adjustment on an XT125r engine i have removed , ill be fitting the engine soon so ill take some photos of this as i go along .

this ids a very easy job with engine out or in .

make sure you change the o-rings you might get away with it but more often than not no and oil will leak
especially around the cam sprocket cover and drip onto exhaust causing excess smoke .




Yamaha xt125r blog valve clearance tappet
                                                   remove inspection covers ( 24mm)
Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

change all O-rings 

Yamaha xt125r blog valve clearance
                                              remove plastic inspection covers
                                    use a good fitting tool to avoid damage to
                                                                   them .
Yamaha xt125r blog valve clearance
                                                remove camshaft sprocket cover
Yamaha xt125r blog valve clearance
                                                          change this O-ring otherwise this leaks
                                                          directly onto exhaust
Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance


Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance
                               turn engine over anti clockwise with crank nut ( 17mm)
Yamaha xt125r blog valve clearance
                      make sure piston is at top dead centre and marks are aligned on the             sprocket ( white marks ) i have painted them white but manufacturer markings
                                                                  are easy to see
Yamaha xt125r blog valve clearance 

make sure lower marks are aligned buy viewing in inspection window

Yamaha xt125r blog valve clearance

then make sure you have free play in both rocker arm 
to ensure you are a TDC on compression stroke (valves closed )

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance
                                                      check clearance gap is with above specs
Yamaha xt125r blog valve clearance
                                                               adjust where necessary
Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

Yamaha xt125r blog valve clearance

easy now just check every thing is tightened to specs and turn engine over a couple of times 
make sure things go smooth and fit inspection covers changing o-rings .


                                         

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